jQuery 使用javascript测试文件是否存在
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Test if a file exists with javascript
提问by dezman
This question has already been asked hereand here. But I have tried three of the answers with no good luck. I am using a system called Niagara which is acting as a web server, which may be the reason these techniques did not work. Nonetheless, I feel there must be a way to check for the existence of a file, not the existence of a 404 or 200 or 0.
这个问题已经在这里和这里被问到了。但是我已经尝试了三个答案，但运气不佳。我正在使用一个名为 Niagara 的系统，它充当 Web 服务器，这可能是这些技术不起作用的原因。尽管如此，我觉得必须有一种方法来检查文件是否存在，而不是 404 或 200 或 0 的存在。
回答by karthikr
You can use $.ajax
您可以使用 $.ajax
$.ajax({
url: 'example.com/abc.html', //or your url
success: function(data){
alert('exists');
},
error: function(data){
alert('does not exist');
},
})
